package mustache

  1. Overview
  2. Docs

Source file mustache_lexer.ml

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# 22 "mustache/lib/mustache_lexer.mll"
 
  open Lexing
  open Mustache_parser

  exception Error of string

  let tok_arg lexbuf f =
    let start_p = lexbuf.Lexing.lex_start_p in
    let x = f lexbuf in
    lexbuf.Lexing.lex_start_p <- start_p;
    x

  let lex_tag lexbuf space ident tag_end =
    tok_arg lexbuf (fun lexbuf ->
      let () = space lexbuf in
      let name = ident lexbuf in
      let () = space lexbuf in
      let () = tag_end lexbuf in
      name
    )

  let split_ident ident =
    if ident = "." then []
    else String.split_on_char '.' ident

  let check_mustaches ~expected ~lexed =
    if expected <> lexed then
      raise (Error (Printf.sprintf "'%s' expected" expected))

# 32 "mustache/lib/mustache_lexer.ml"
let __ocaml_lex_tables = {
  Lexing.lex_base =
   "\000\000\001\000\255\255\000\000\078\000\255\255\156\000\234\000\
    \092\001\011\000\012\000\013\000\255\255\202\000\251\255\252\255\
    \254\255\203\000\237\000\014\000\255\255\026\001\242\255\243\255\
    \245\255\027\001\095\001\017\000\074\001\246\255\247\255\248\255\
    \249\255\250\255\251\255\252\255\253\255\254\255";
  Lexing.lex_backtrk =
   "\001\000\255\255\255\255\001\000\000\000\255\255\255\255\000\000\
    \000\000\000\000\255\255\000\000\255\255\002\000\255\255\255\255\
    \255\255\002\000\002\000\003\000\255\255\011\000\255\255\255\255\
    \255\255\011\000\011\000\012\000\000\000\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255";
  Lexing.lex_default =
   "\255\255\255\255\000\000\255\255\255\255\000\000\255\255\255\255\
    \008\000\255\255\255\255\255\255\000\000\017\000\000\000\000\000\
    \000\000\017\000\017\000\255\255\000\000\025\000\000\000\000\000\
    \000\000\025\000\025\000\255\255\255\255\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000";
  Lexing.lex_trans =
   "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\002\000\002\000\000\000\001\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\004\000\005\000\004\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\004\000\004\000\004\000\004\000\004\000\004\000\004\000\
    \004\000\004\000\004\000\004\000\004\000\004\000\004\000\004\000\
    \004\000\004\000\004\000\004\000\004\000\004\000\004\000\004\000\
    \004\000\004\000\004\000\000\000\000\000\000\000\000\000\004\000\
    \000\000\004\000\004\000\004\000\004\000\004\000\004\000\004\000\
    \004\000\004\000\004\000\004\000\004\000\004\000\004\000\004\000\
    \004\000\004\000\004\000\004\000\004\000\004\000\004\000\004\000\
    \004\000\004\000\004\000\004\000\006\000\004\000\004\000\004\000\
    \004\000\004\000\004\000\004\000\004\000\004\000\004\000\004\000\
    \010\000\011\000\012\000\020\000\028\000\000\000\000\000\004\000\
    \004\000\004\000\004\000\004\000\004\000\004\000\004\000\004\000\
    \004\000\004\000\004\000\004\000\004\000\004\000\004\000\004\000\
    \004\000\004\000\004\000\004\000\004\000\004\000\004\000\004\000\
    \004\000\000\000\000\000\000\000\000\000\004\000\000\000\004\000\
    \004\000\004\000\004\000\004\000\004\000\004\000\004\000\004\000\
    \004\000\004\000\004\000\004\000\004\000\004\000\004\000\004\000\
    \004\000\004\000\004\000\004\000\004\000\004\000\004\000\004\000\
    \004\000\007\000\000\000\007\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\016\000\016\000\000\000\018\000\
    \018\000\000\000\000\000\000\000\000\000\007\000\007\000\007\000\
    \007\000\007\000\007\000\007\000\007\000\007\000\007\000\007\000\
    \007\000\007\000\007\000\007\000\007\000\007\000\007\000\007\000\
    \007\000\007\000\007\000\007\000\007\000\007\000\007\000\016\000\
    \000\000\000\000\018\000\007\000\000\000\007\000\007\000\007\000\
    \007\000\007\000\007\000\007\000\007\000\007\000\007\000\007\000\
    \007\000\007\000\007\000\007\000\007\000\007\000\007\000\007\000\
    \007\000\007\000\007\000\007\000\007\000\007\000\007\000\007\000\
    \006\000\007\000\007\000\007\000\007\000\007\000\007\000\007\000\
    \007\000\007\000\007\000\007\000\024\000\024\000\000\000\026\000\
    \026\000\000\000\000\000\007\000\007\000\007\000\007\000\007\000\
    \007\000\007\000\007\000\007\000\007\000\007\000\007\000\007\000\
    \007\000\007\000\007\000\007\000\007\000\007\000\007\000\007\000\
    \007\000\007\000\007\000\007\000\007\000\015\000\255\255\019\000\
    \255\255\007\000\000\000\007\000\007\000\007\000\007\000\007\000\
    \007\000\007\000\007\000\007\000\007\000\007\000\007\000\007\000\
    \007\000\007\000\007\000\007\000\007\000\007\000\007\000\007\000\
    \007\000\007\000\007\000\007\000\007\000\255\255\255\255\000\000\
    \255\255\024\000\255\255\029\000\026\000\035\000\030\000\000\000\
    \036\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\033\000\000\000\000\000\255\255\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\031\000\000\000\
    \032\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\027\000\255\255\023\000\
    \255\255\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \034\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\037\000\000\000\000\000\
    \000\000\000\000\014\000\255\255\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\255\255\
    \000\000\255\255\255\255\000\000\255\255\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\255\255\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\022\000\255\255\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\
    \000\000\000\000\000\000\000\000\255\255\000\000\000\000\255\255\
    ";
  Lexing.lex_check =
   "\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\000\000\000\000\001\000\255\255\000\000\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \000\000\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\003\000\003\000\003\000\
    \255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\003\000\003\000\003\000\003\000\003\000\003\000\003\000\
    \003\000\003\000\003\000\003\000\003\000\003\000\003\000\003\000\
    \003\000\003\000\003\000\003\000\003\000\003\000\003\000\003\000\
    \003\000\003\000\003\000\255\255\255\255\255\255\255\255\003\000\
    \255\255\003\000\003\000\003\000\003\000\003\000\003\000\003\000\
    \003\000\003\000\003\000\003\000\003\000\003\000\003\000\003\000\
    \003\000\003\000\003\000\003\000\003\000\003\000\003\000\003\000\
    \003\000\003\000\003\000\004\000\004\000\004\000\004\000\004\000\
    \004\000\004\000\004\000\004\000\004\000\004\000\004\000\004\000\
    \009\000\010\000\011\000\019\000\027\000\255\255\255\255\004\000\
    \004\000\004\000\004\000\004\000\004\000\004\000\004\000\004\000\
    \004\000\004\000\004\000\004\000\004\000\004\000\004\000\004\000\
    \004\000\004\000\004\000\004\000\004\000\004\000\004\000\004\000\
    \004\000\255\255\255\255\255\255\255\255\004\000\255\255\004\000\
    \004\000\004\000\004\000\004\000\004\000\004\000\004\000\004\000\
    \004\000\004\000\004\000\004\000\004\000\004\000\004\000\004\000\
    \004\000\004\000\004\000\004\000\004\000\004\000\004\000\004\000\
    \004\000\006\000\255\255\006\000\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\013\000\017\000\255\255\013\000\
    \017\000\255\255\255\255\255\255\255\255\006\000\006\000\006\000\
    \006\000\006\000\006\000\006\000\006\000\006\000\006\000\006\000\
    \006\000\006\000\006\000\006\000\006\000\006\000\006\000\006\000\
    \006\000\006\000\006\000\006\000\006\000\006\000\006\000\018\000\
    \255\255\255\255\018\000\006\000\255\255\006\000\006\000\006\000\
    \006\000\006\000\006\000\006\000\006\000\006\000\006\000\006\000\
    \006\000\006\000\006\000\006\000\006\000\006\000\006\000\006\000\
    \006\000\006\000\006\000\006\000\006\000\006\000\006\000\007\000\
    \007\000\007\000\007\000\007\000\007\000\007\000\007\000\007\000\
    \007\000\007\000\007\000\007\000\021\000\025\000\255\255\021\000\
    \025\000\255\255\255\255\007\000\007\000\007\000\007\000\007\000\
    \007\000\007\000\007\000\007\000\007\000\007\000\007\000\007\000\
    \007\000\007\000\007\000\007\000\007\000\007\000\007\000\007\000\
    \007\000\007\000\007\000\007\000\007\000\013\000\017\000\013\000\
    \017\000\007\000\255\255\007\000\007\000\007\000\007\000\007\000\
    \007\000\007\000\007\000\007\000\007\000\007\000\007\000\007\000\
    \007\000\007\000\007\000\007\000\007\000\007\000\007\000\007\000\
    \007\000\007\000\007\000\007\000\007\000\008\000\008\000\255\255\
    \018\000\026\000\018\000\028\000\026\000\028\000\028\000\255\255\
    \028\000\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\028\000\255\255\255\255\008\000\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255\028\000\255\255\
    \028\000\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\021\000\025\000\021\000\
    \025\000\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \028\000\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\028\000\255\255\255\255\
    \255\255\255\255\013\000\017\000\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255\255\255\008\000\
    \255\255\008\000\026\000\255\255\026\000\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\018\000\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\255\255\021\000\025\000\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\255\
    \255\255\255\255\255\255\255\255\008\000\255\255\255\255\026\000\
    ";
  Lexing.lex_base_code =
   "";
  Lexing.lex_backtrk_code =
   "";
  Lexing.lex_default_code =
   "";
  Lexing.lex_trans_code =
   "";
  Lexing.lex_check_code =
   "";
  Lexing.lex_code =
   "";
}

let rec space lexbuf =
   __ocaml_lex_space_rec lexbuf 0
and __ocaml_lex_space_rec lexbuf __ocaml_lex_state =
  match Lexing.engine __ocaml_lex_tables __ocaml_lex_state lexbuf with
      | 0 ->
# 78 "mustache/lib/mustache_lexer.mll"
                  ( new_line lexbuf; space lexbuf )
# 229 "mustache/lib/mustache_lexer.ml"

  | 1 ->
# 79 "mustache/lib/mustache_lexer.mll"
          ( () )
# 234 "mustache/lib/mustache_lexer.ml"

  | __ocaml_lex_state -> lexbuf.Lexing.refill_buff lexbuf;
      __ocaml_lex_space_rec lexbuf __ocaml_lex_state

and ident lexbuf =
   __ocaml_lex_ident_rec lexbuf 3
and __ocaml_lex_ident_rec lexbuf __ocaml_lex_state =
  match Lexing.engine __ocaml_lex_tables __ocaml_lex_state lexbuf with
      | 0 ->
# 82 "mustache/lib/mustache_lexer.mll"
          ( lexeme lexbuf )
# 246 "mustache/lib/mustache_lexer.ml"

  | 1 ->
# 83 "mustache/lib/mustache_lexer.mll"
          ( raise (Error "ident expected") )
# 251 "mustache/lib/mustache_lexer.ml"

  | __ocaml_lex_state -> lexbuf.Lexing.refill_buff lexbuf;
      __ocaml_lex_ident_rec lexbuf __ocaml_lex_state

and partial_name lexbuf =
   __ocaml_lex_partial_name_rec lexbuf 8
and __ocaml_lex_partial_name_rec lexbuf __ocaml_lex_state =
  match Lexing.engine __ocaml_lex_tables __ocaml_lex_state lexbuf with
      | 0 ->
# 86 "mustache/lib/mustache_lexer.mll"
                 ( lexeme lexbuf )
# 263 "mustache/lib/mustache_lexer.ml"

  | __ocaml_lex_state -> lexbuf.Lexing.refill_buff lexbuf;
      __ocaml_lex_partial_name_rec lexbuf __ocaml_lex_state

and end_on expected lexbuf =
   __ocaml_lex_end_on_rec expected lexbuf 9
and __ocaml_lex_end_on_rec expected lexbuf __ocaml_lex_state =
  match Lexing.engine __ocaml_lex_tables __ocaml_lex_state lexbuf with
      | 0 ->
let
# 89 "mustache/lib/mustache_lexer.mll"
                           lexed
# 276 "mustache/lib/mustache_lexer.ml"
= Lexing.sub_lexeme lexbuf lexbuf.Lexing.lex_start_pos lexbuf.Lexing.lex_curr_pos in
# 89 "mustache/lib/mustache_lexer.mll"
                                 ( check_mustaches ~expected ~lexed )
# 280 "mustache/lib/mustache_lexer.ml"

  | __ocaml_lex_state -> lexbuf.Lexing.refill_buff lexbuf;
      __ocaml_lex_end_on_rec expected lexbuf __ocaml_lex_state

and comment acc lexbuf =
   __ocaml_lex_comment_rec acc lexbuf 13
and __ocaml_lex_comment_rec acc lexbuf __ocaml_lex_state =
  match Lexing.engine __ocaml_lex_tables __ocaml_lex_state lexbuf with
      | 0 ->
# 92 "mustache/lib/mustache_lexer.mll"
                ( String.concat "" (List.rev acc) )
# 292 "mustache/lib/mustache_lexer.ml"

  | 1 ->
# 93 "mustache/lib/mustache_lexer.mll"
                ( new_line lexbuf; comment ((lexeme lexbuf) :: acc) lexbuf )
# 297 "mustache/lib/mustache_lexer.ml"

  | 2 ->
# 94 "mustache/lib/mustache_lexer.mll"
                ( comment ((lexeme lexbuf) :: acc) lexbuf )
# 302 "mustache/lib/mustache_lexer.ml"

  | 3 ->
# 95 "mustache/lib/mustache_lexer.mll"
                ( comment ((lexeme lexbuf) :: acc) lexbuf )
# 307 "mustache/lib/mustache_lexer.ml"

  | 4 ->
# 96 "mustache/lib/mustache_lexer.mll"
                ( raise (Error "non-terminated comment") )
# 312 "mustache/lib/mustache_lexer.ml"

  | __ocaml_lex_state -> lexbuf.Lexing.refill_buff lexbuf;
      __ocaml_lex_comment_rec acc lexbuf __ocaml_lex_state

and mustache lexbuf =
   __ocaml_lex_mustache_rec lexbuf 21
and __ocaml_lex_mustache_rec lexbuf __ocaml_lex_state =
  match Lexing.engine __ocaml_lex_tables __ocaml_lex_state lexbuf with
      | 0 ->
# 99 "mustache/lib/mustache_lexer.mll"
                 ( ESCAPE (lex_tag lexbuf space ident (end_on "}}") |> split_ident) )
# 324 "mustache/lib/mustache_lexer.ml"

  | 1 ->
# 100 "mustache/lib/mustache_lexer.mll"
                 ( UNESCAPE (lex_tag lexbuf space ident (end_on "}}}") |> split_ident) )
# 329 "mustache/lib/mustache_lexer.ml"

  | 2 ->
# 101 "mustache/lib/mustache_lexer.mll"
                 ( UNESCAPE (lex_tag lexbuf space ident (end_on "}}") |> split_ident) )
# 334 "mustache/lib/mustache_lexer.ml"

  | 3 ->
# 102 "mustache/lib/mustache_lexer.mll"
                 ( OPEN_SECTION (lex_tag lexbuf space ident (end_on "}}") |> split_ident) )
# 339 "mustache/lib/mustache_lexer.ml"

  | 4 ->
# 103 "mustache/lib/mustache_lexer.mll"
                 ( OPEN_INVERTED_SECTION (lex_tag lexbuf space ident (end_on "}}") |> split_ident) )
# 344 "mustache/lib/mustache_lexer.ml"

  | 5 ->
# 104 "mustache/lib/mustache_lexer.mll"
                 ( CLOSE (lex_tag lexbuf space partial_name (end_on "}}")) )
# 349 "mustache/lib/mustache_lexer.ml"

  | 6 ->
# 105 "mustache/lib/mustache_lexer.mll"
                 ( PARTIAL (0, lex_tag lexbuf space partial_name (end_on "}}")) )
# 354 "mustache/lib/mustache_lexer.ml"

  | 7 ->
# 106 "mustache/lib/mustache_lexer.mll"
                 ( OPEN_PARTIAL_WITH_PARAMS (0, lex_tag lexbuf space partial_name (end_on "}}")) )
# 359 "mustache/lib/mustache_lexer.ml"

  | 8 ->
# 107 "mustache/lib/mustache_lexer.mll"
                 ( OPEN_PARAM (0, lex_tag lexbuf space ident (end_on "}}")) )
# 364 "mustache/lib/mustache_lexer.ml"

  | 9 ->
# 108 "mustache/lib/mustache_lexer.mll"
                 ( COMMENT (tok_arg lexbuf (comment [])) )
# 369 "mustache/lib/mustache_lexer.ml"

  | 10 ->
# 109 "mustache/lib/mustache_lexer.mll"
                 ( new_line lexbuf; RAW (lexeme lexbuf) )
# 374 "mustache/lib/mustache_lexer.ml"

  | 11 ->
# 110 "mustache/lib/mustache_lexer.mll"
                 ( RAW (lexeme lexbuf) )
# 379 "mustache/lib/mustache_lexer.ml"

  | 12 ->
# 111 "mustache/lib/mustache_lexer.mll"
                 ( RAW (lexeme lexbuf) )
# 384 "mustache/lib/mustache_lexer.ml"

  | 13 ->
# 112 "mustache/lib/mustache_lexer.mll"
                 ( EOF )
# 389 "mustache/lib/mustache_lexer.ml"

  | __ocaml_lex_state -> lexbuf.Lexing.refill_buff lexbuf;
      __ocaml_lex_mustache_rec lexbuf __ocaml_lex_state

;;

# 114 "mustache/lib/mustache_lexer.mll"
 
   (* Trim whitespace around standalone tags.

      The Mustache specification is careful with its treatment of
      whitespace. In particular, tags that do not themselves expand to
      visible content are defined as "standalone", with the
      requirement that if one or several standalone tags "stand alone"
      in a line (there is nothing else but whitespace), the whitespace
      of this line should be ommitted.

      For example, this means that:
        {{#foo}}
        I can access {{var}} inside the section.
        {{/foo}
      takes, once rendered, only 1 line instead of 3: the newlines
      after {{#foo}} and {{/foo}} are part of the "standalone
      whitespace", so they are not included in the output.

      Note: if a line contains only whitespace, no standalone tag,
      then the whitespace is preserved.

      We implement this by a post-processing past on the lexer token
      stream.  We split the token stream, one sub-stream per line, and
      then for each token line we determine if satisfies the
      standalone criterion.

      Another information collected at the same time, as it is also
      part of whitespace processing, is the "indentation" of partials:
      if a partial expands to multi-line content, and if it is
      intended at the use-site (it is at a non-zero column with only
      whitespace before it on the line), then the specification
      mandates that all its lines should be indented by the same
      amount.  We collect this information during the whitespace
      postprocessing of tokens, and store it in the Partial
      constructor as the first parameter.
   *)
   let handle_standalone lexer lexbuf =
     let ends_with_newline s =
       String.length s > 0 &&
       s.[String.length s - 1] = '\n'
     in
     let get_loc () = lexbuf.Lexing.lex_curr_p in
     let get_tok () =
       let loc_start = get_loc () in
       let tok = lexer lexbuf in
       let loc_end = get_loc () in
       (tok, loc_start, loc_end)
     in
     let slurp_line lookahead =
       let rec start = function
         | None -> loop []
         | Some lookahead -> continue [] lookahead
       and loop acc =
         continue acc (get_tok ())
       and continue acc tok =
         match tok with
         | EOF, _, _ -> (List.rev (tok :: acc), None)
         | RAW s, _, _ when ends_with_newline s ->
           let lookahead = get_tok () in
           (List.rev (tok :: acc), Some lookahead)
         | _ -> loop (tok :: acc)
       in
       start lookahead
     in
     let count_indentation s =
       let i = ref 0 in
       let len = String.length s in
       while (!i < len
              && match s.[!i] with ' ' | '\t' | '\r' | '\n' -> true | _ -> false)
       do
         incr i
       done;
       !i
     in
     let is_blank s =
       count_indentation s = String.length s
     in
     let skip_blanks l =
       let rec loop skipped = function
         | (RAW s, _, _) :: toks when is_blank s ->
           loop (skipped + String.length s) toks
         | toks -> (skipped, toks)
       in
       loop 0 l
     in
     let trim_standalone toks lookahead =
       let toks =
         (* if the line starts with a partial,
            turn the skipped blank into partial indentation *)
         let (skipped, toks_after_blank) = skip_blanks toks in
         match toks_after_blank with
         | (PARTIAL (_      , name), loc1, loc2) :: rest ->
           (PARTIAL (skipped, name), loc1, loc2) :: rest
         | (OPEN_PARTIAL_WITH_PARAMS (_      , name), loc1, loc2) :: rest ->
           (OPEN_PARTIAL_WITH_PARAMS (skipped, name), loc1, loc2) :: rest
         | (OPEN_PARAM (_      , name), loc1, loc2) :: rest ->
           (* we want to count the indentation of
                {{$param}}
                  blah blah
                {{/param}}
             as the indentation of 'blah blah', not the indentation
             of '{{$param}}' itself: using the parameter tag instead of the content
             as indentation would result in the content being over-indented at each occurrence.
           *)
           let skipped =
             match rest, lookahead with
             | ((RAW end_of_line, _, _) :: _),
               Some (RAW start_of_next_line, _, _) when ends_with_newline end_of_line ->
               count_indentation start_of_next_line
           | _ -> skipped
         in
           (OPEN_PARAM (skipped, name), loc1, loc2) :: rest
         | _ -> toks
       in
       let toks =
         (* if the line only contains whitespace and at least one standalone tags,
            remove all whitespace *)
         let rec standalone acc = function
           | (RAW s, _, _) :: rest when is_blank s ->
             (* omit whitespace *)
             standalone acc rest
           | ((OPEN_SECTION _
              | OPEN_INVERTED_SECTION _
              | CLOSE _
              | PARTIAL _
              | OPEN_PARTIAL_WITH_PARAMS _
              | OPEN_PARAM _
              | COMMENT _), _, _) as tok :: rest ->
             (* collect standalone tags *)
             standalone (tok :: acc) rest
           | [] | (EOF, _, _) :: _ ->
             (* end of line *)
             if (acc = []) then
               (* if acc is empty, the line only contains whitespace,
                  which should be kept *)
               None
             else
               Some (List.rev acc)
           | _non_blank :: _rest ->
             (* non-blank, non-standalone token *)
             None
         in
         match standalone [] toks with
         | None -> toks
         | Some standalone_toks -> standalone_toks
       in
       assert (toks <> []);
       toks
     in
     let line_rest = ref [] in
     let lookahead = ref None in
     fun () ->
       match !line_rest with
       | next :: rest ->
         line_rest := rest;
         next
       | [] ->
         let next_line, next_lookahead = slurp_line !lookahead in
         let next_line = trim_standalone next_line next_lookahead in
         line_rest := List.tl next_line;
         lookahead := next_lookahead;
         List.hd next_line

# 560 "mustache/lib/mustache_lexer.ml"